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List: kde
Subject: Re: [kde] Has the KDE Social/Semantic Desktop been worth the hassle to anyone?
From: "Martin (KDE)" <kde () fahrendorf ! de>
Date: 2012-11-18 19:27:07
Message-ID: 50A9368B.9010802 () fahrendorf ! de
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Am 18.11.2012 20:05, schrieb Kevin Krammer:
> On Sunday, 2012-11-18, Martin (KDE) wrote:
>> Am 18.11.2012 11:52, schrieb Kevin Krammer:
>>> If a switch in default backend would have to propagate to the user
>>> installations, this would require some changes in the user home
>>> directories as well (moving stuff from one database to another).
>>> I am quite certain that the upstream default regarding backend hasn't
>>> changed, so any distribution changing the default will either have
>>> deployed a migration process of some sort anyway or leave existing
>>> setups untouched by choice in order not to have to.
>>
>> Hm, I am a little bit astonished here. If the data in the mysql database
>> is cache only data, then simply changing the configuration should do the
>> trick. I would have two caches laying around, but thats it.
>
> True for the read cache, not so true for the write cache.
>
>> What do I have to migrate then?
>
> For example there could be data that has not yet been written to its backend.
> That would be the case if Akonadi is shut down (e.g. due to logout) while one
> of the resources that had user changes was not online (e.g. could not connect
> to its server).
>
> There could also be meta data that a backend was not able to handle itself,
> e.g. read/unread status of emails from an mbox file.
>
> While discarding of meta data would be no more than an annoyance, discarding
> of uncommitted changes could be (an uncommitted deleted would be just an
> annoyance and uncommitted add not so much).
So, if I want to switch from mysql to sqlite I have to
- stop akonadi
- wait a few seconds to let akonadi sync
- switch to sqlite
- start akonadi
With imap and maildir all should be the same as before.
Is there a backup thingy that creates pure sql statements to migrate the
data?
Regards
Martin
>
> Cheers,
> Kevin
>
>
>
>
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